ML20005B377
| ML20005B377 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/02/1981 |
| From: | Fasano A, Kalman G, Oneill B Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| PNO-TMI-81-014, PNO-TMI-81-14, NUDOCS 8107080135 | |
| Download: ML20005B377 (2) | |
Text
1 l
l PRELIMINARY NOTIFICATION 50320070181 r
July z, iwi PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-TMI-81-14 This preliminar_y notification constitutues EARLY notirpof; eyents of POSSIBLE safety or public interest significance.
The information pypsstedli&Chinitially received _
without verification or evaluation and is basicalMTl,t%t.js'%wn by NRC staff on this date.
9
'ty Facility: Metropolitan Edison Company
( "JUL 0 7198lm t" Three Mile Island, Unit 2
E u ?
Middletown, Pennsylvania Docket Number 50-320
'y
Subject:
CONTAMINATION INCIDENT DURING REACTOR BUI y#
ULY 1, 1981 (ENTRY #13)
During the Unit 2 Reactor Building entry on July 1,1981, four technicians inspected and surveyed the polar crane.
The results of the two hour inspection indicated that all six of the crane motors which were meggered had faulty wiring. There are a total of 14 motors on the Unit 2 polar crane.
Insulation on power cables was damaged to the extent that bare conducting wires were visible.
On previous entries, damage to electrical components was observed only on small gage electrical wires.
The wooden operator's cab on top of the crane was charred and there were indications that flames had existed in the cab. Crane mechanical components appeared undamaged although there were patches of rust. The licensee is evaluating the information to determine what repairs will be necessary to refurbish the polar crane.
The polar crane will be needed to remove the reactor vessel head and internals prior, to fuel removal.
Upon exiting the Reactor Building, the team underwent routine " frisking" for radioactive contamination.
This frisking revealed that portions of the skin on each of the four team members were contaminated.
Standard decontamination procedures were initiated.
Frisking after the completion of the decontamination revealed persistent contamination levels of approximately 2,500 dpm on two individuals (arms), and 5,000 dpm on another (left buttock).
The fourth individual was successfully decontaminated.
Licensee representatives decided at 4:30 p.m., July 1,1981, that outside consultant medical assistance and advice would be requested.
A 10 CFR 50.72 report to the NRC Operation Center was made concurrently with the request for assistance.
A whole
' body count (ganma scan) on each individual has been scheduled, and is a requirement after each Reactor' Building entry'.
As of 9:00 a.m., July 2,1981, the licensee reported that the contamination levels had been reduced to less than 500 dpm on two of the individuals.
The remaining individual was decontaminated to less than 1100 dpm.
The contamination is localized to a small portion of the skin on the left buttock.
The dose incurred by any of the individuals due to the contamination is less than one millirem to the skin.
PDR I&E d
hA I 8107080135 810702 P PNO-TMI-81-014PDRh 1
PN0-TMI-81-14 (continued) July 2, 1981 This preliminary notification is issued for information only.
The onsite NRC staff will continue to review this occurrance and its possiMe causes.
The licensee plans to issue a press release today.
The Comnonwealth of Pennsylvania has been informed.
The NRC does not plan to issue a press release.
The NRC TMI Program Office received notification o this event from Unit 2 Operations et 4:30 p.m.,
ly 1, 7g' Ccatact:
G an
-1136 B. O'N ill 590-1144 M. Shanbaky 590-1140 0, *1, vD aw A. Fas no 590-1123 11 Barre 't 590-1120 DISTRIBUTION:
(Facsimile Transmission Times Noted)
IE:TAS MARYLAND NATIONAL Region I (E/W TOWERS)
BANK BLDG Region Il W. J. Dircks, EDO Region III H ST BLDG C. Michelson, AEDO Region IV Chairman Hendrie J. J. Fouchard, PA Region V Commissioner Gilinsky N. M. Haller, MPA Commissioner Bradford H. K. Shapar, ELD NSAC e
Commissioner Ahearne INP0 ACRS AIR RIGHTS BLDG S. J. Chilk, SECY G. W. Kerr, SP (MAIL) l C. C. Kammerer, CA B. J. Snyder, NRR IE TAS l
dhcument Mgt. BQ PHILLIPS BLDG WILLSTE BLDG S. tubin, n30u H. R. Denton, NRR J. G. Davis, HMSS J. Tourtellotte R. H. Vollmer, NRR R. B. Minogue, RES Asst. Chief Hearing T. E. Murley, NRR Counsel, OELD D. Eisenhut, NR0 LANDOW BLDG (Fax by HQ)
DOT (Transportation S. H. Hanauer,tiRR (6 MIN /PAGE) only)
R. J. Mattson, NRR J. J. Cummings, OIA PRELIMINARY NOTIFICATION
._.